I need help asap

ok so I was with my boyfriend and he was messing around and found these rings and jokingly proposed. well they went on fine but I can't get them off we found out that they are silver its been about 12 hours that I've had them stuck on my finger it is 2x its normal size and idk what to do and I need help ASAP I don't wanna cut it off but I can't keep them on please someone what do I do I'm 15 and don't wanna tell my parents please help its starting to hurt slightly and one place on my knuckle I rubbed the skin off when j was trying to get it off and I just need it off please